Yellow Speed Racing Pro Sport Digressive Series Coilovers - 2015-2021 Subaru WRX / STI PDM_motor-builds This design element is critical

This design element is critical

Ideal for high RPM and high G-force driving conditions

or XS performance rotors

Anti-skid backing and raised edges for secure placement and leak prevention

Radium Engineering DI ECU Mount Kit

Yellow Speed Racing Pro Sport Digressive Series Coilovers - 2015-2021 Subaru WRX / STI PDM_motor-builds This design element is criticalYellow Speed Racing Pro Sport Digressive Series Coilovers 2015 2021 Subaru WRX STI The Yellow Speed Racing Dynamic Pro Sport is the coilover that covers both ends of the street to track spectrum without forcing you to choose. the Subaru STI Subaru WRX 33 way adjustable damping, pillowball front camber plates, and application matched spring rates give you a setup that handles confidently daily and holds its own at the track. FRONT REAR Spring Rate 8k